Sealed foil package and method of forming the same



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3 SHEETS-SHEET I.

. gg wjegtot E. 1. CONLEY. SEALED FOIL PACKAGE AND METHOD OF FORMING THE SAME.

APPLICATION FILED MAB-10! 1922- A lififi3 8fll. a n e M31, 1922.

3 SHEETSSHEET 2.

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E. J. CONLEY.

SEALED FOIL PACKAGE AND METHOD OF FORMING THE SAME. APPLICATION FILED MAR. 10. 1922.

l,%88,801 o Patented Oct. 31, 1922 3 SHEETS-SHEET 3.

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Patented Uct. mi, 1922.

nm'rso STATES,

PATENT OFFICE.

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SEALED FOIL PACKAGE AND METHOD OF FORMING THE SAME.

Application filed March 10, 1922. Serial No. 542,602.

Method of Forming the Same, ofwhich the following is a specification.

This invention has as an object the. making of a sealed foilpackage by theuse .of

additional sheets of foil arranged to cover the overlapping flaps and edges of the package. A further object of the invention is to utilize sheets of relatively thin foil for covering said flaps and edges. More specifithe invention has as an object the sealing of such a package by fusing the additional sheets of foil to the overlapping por tions thereof. A still further object of the invention is to provide a suitable process for' r package 111 order to clearly illustrate the relmaking a package as described above.

These ob'ects and others are attained by this inventlon, of which the following description constitutes several preferred embodiments.

The annexed drawings which form part ,of the specification illustrate various packages and ways of sealing them with foil, and illustrations have been made with a view of showing the manner in which the foil is placed around the package with respect to the overlapping flaps and edges thereof,

These illustrations are not to be taken as showing actual steps in the method of applying said foil; the specific methods of bringing the separate fo l into contact with the overlapping flaps and edges in order to fuse them are not intended to be shown by these illustrations.

Accordingly, Figure 1 shows a package with a continuous sheet of foil to be placed over the folded flaps and overlapping edges on the wide side of the package;

Fig. 2 shows a similar package with separate sheets of foil; I

Fig. 3 shows a package with a continuous sheet of foil to be placed over the folded flaps and the overlapping edges on the narrow side of the package;

Fig. 4 shows a similar package with separate sheets of foil; Fig. 5 shows a package with several sheets of foil to be placed over the folded flaps and a narrow strip of foil to be placed over the folded edges on the wide side;

Fig. 6 shows a bag of usual shape with a strlp or sheet of fo1l placed alon'gthe folded edges on the wide side, and Fig. 7 is an ele-- vation on a reduced scale of a fusing surface that 1s adapted for fusing flaps on a package where the flaps are of substantially different elevations, and. particularly and such a package.

In said Fig. 1 there is showna package 1 made up ofpapercovered with metal foil in the usual .way and folded in theusual manner to provide flaps 2 and 3 at the ends of the package The edge of the overlapping fo1l is shown by the line-'4 on the upper upona package having unyielding contents a or wide side of the package. A continuous sheet .of foil 5 is provided to cover said wide side and the ends of the package in order to completely cover up all folded portions. This foil 5 is shown raised up above the ative dimensions and arrangements of the parts, but it is of course to be understood that the foil is not applied by slipping it over the package as shown. When placed over these folded portions as above set forth, the sheet of foil is fused to the foilcovering of the package byv heated sealing means havln a suitable temperature such as $00 to 600 in a manner more specifically de scribed in my Patent 1,398,840. Thev overlapplng flaps and edges. are not fused together in the manner described in my above mentioned patent, course be performed if so desired. The sealing of the foil sheet 5 to the sides of the package having folds and flaps accomplishes a perfect hermetic sealing without additional sealing means.

Fig. 2 shows the same method of sealing except that the sheets are separate, in case it is desired to use separate mechanical but this-step may of v means for applying the thin foil. These sheets are designated as 6, 7,8.

Fig. 3 shows a sheet of thin foil 9 to be placed around the package on the narrow side thereof in order to seal overlapping edge 10 which occurs in this case on the narrow side of the package, and to seal the overlapping flaps on the ends of the package. Fig. 4; shows a package similar to thatof Fig. 3 with separate sheets of foil 11, 12 and 13 to cover the ends -andthe narrow side respectively.

Fig. 5 shows the package having the over- 7 of foil having the dimensions A, B, D, G is relation to the ends of lapping flap on the wide side along line 14 and then sealed by a sheet of foil "15 narrower than the full width of the side, as it is unnecessary to cover theentire side. sep arate sheets of foil 16 and 17 are shown in the package to which they are to'be fused. g; 6 shows a bag consisting of a .sheet of paper 18 covered by a sheet'of foil 19 folded in the usual manner to provide overlapping edgesat point 20, and the usual flaps at the bottom of the bag'represented by dotted lines A, B, C, and D, E, F, G, regp'ectively. The lines A, H; H, D; I l, J K, and H, L- (all shown as full lines) represent the folds in the bag when it is foldedin the usual manner to lie flat. A relatively thin sheet of foil represented by the rectangle 21, '22, 24, 23 is placed over the overlapping edges at 20 and sealed by.

fusion to the bag. Another separate sheet placed against the bottom 'of the bag and similarlyyfused thereto. The bag is thereafter handled in the usual manner, and may be hermeticall sealed at the top by fusing a sheet of foi along the top edge to cover the same completely.

These various views do not illustrate all of thevarious embodiments of the invention, but are merely illustrative of several advantageous ways-in which a package may be,

' formed. according to. this'invention. It is the body of the package should have any unusual characteristics; in other words, it may be ordinary'foihbut thefoil. with which the package is .finally sealed preferably iIIustratedmay contain unyielding contents such as boxes, or they may contain yieldable contents such as cigarettes. The specific method of bringing the metal foil sheet or sheets into contact with the respective pertions of the package and thereupon fusing them together does not formpart of my in-- vention, and this operation may, if so desired, be done by hand with the aid of a suitable fusing tool such as is described in my Patent No. 1,398,840. In addition to the advantages recited in said patent, this present invention accomplishes a very secure hermetic sealing of the package by reason of separately covering allfolded portions, and.

it furthermore makes'it possible to use relatively thick foil in forming the body of the package while using relat1vely thin foil to seal the joints. Another advantage resides in the fact that packages formed and folded by the usual types of machinery 'may, by

a simple operation-, be hermetically sealed.

with thinfoil" without rearranging old machinery.

The manner ofusealingmay be similar to' the fusing iron to firmly and permanently fuse to the body of the foil package.

-Where there are a number of flaps or thicknesses more or less overlapping each other, which are either substantially unyielding, because the contents of the package are unyleldingor because the difference in thickness of the said flaps is considerable,-

I prefer to use a sealing surface which is complemental and conformed to the different levels and outlines to be sealed. Such a sealing surface is shown in elevation'in Fig. 7 and is adapted for sealingthe' folded flaps on the end of a package such as the package shown therein. I preferably relatively bring such .a sealing surface into goperation by a movement that is relatively perpendicular to the foil As many apparently widely different embodiments of this invention may be made without departingfrom the spirit thereof, it

is to 'be understood that I do not intend to limit myself to the specific embodiment thereof, except as indicated in the appended "claims. not necessary that the foil forming part of By the term .metallically united, occurring in the claims, is meant united by metallic adhesion or cohesion, such as by fusing or soldering) I I claim: I 1

'1. An enclosure for packages comprising foil, having its. edges sealed by a sheet of foil metallieally united to tlie' foil of said package.

. 2, An enclosure for packages comprising foil, having its edges united by a sheet of foil fused-thereto, J

. 3..An enclosure for packages comprising foil, having its edges overlapping and sealed,

bya sheet of foil fused thereto.

4. An enclosure for packages comprising foil, having its edges united by a sheet of foil fused thereto, .the latter sheet having a thickness less than 3/1000 of an inch.

'5. The method of uniting the edges of a foil enclosure comprising fusing a sheet of relatively thin foil thereto.

6. The method of sealing a package wrapped in foil so as to provide folded flaps comprising fusing a relatively thin sheet of foil over said flaps.

7. The method of hermetically sealing a package wrapped in foil so as to provide overlapping flaps and edges comprising fusmg a relatlvely thin sheet of foil over said flaps and edges.

8..,The method of uniting the edges of a foil enclosure comprising fusing a sheet of ent levelsv and outlines of the portions to be of foilthereto. settled and fusing the contacting surfaces to- 10 9, The method of sealing a package gether. Wrapped in foil so as to provide flaps or y In testimony that claim the foregoing, overlying portions of difierent thicknesses or I have hereunto set my hand this 9th day levels having foil contacting with foil, comof March, 1922. prising applying a, sealing surface which is i complemental and conformed to the difier EDWIN J. CONLEY. 

